21215820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:267

約数の個数: 96

約数和(自身を含む): 62596800

約数和(自身を除く): 41380980

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 29, 30, 58, 60, 87, 89, 116, 137, 145, 174, 178, 267, 274, 290, 348, 356, 411, 435, 445, 534, 548, 580, 685, 822, 870, 890, 1068, 1335, 1370, 1644, 1740, 1780, 2055, 2581, 2670, 2740, 3973, 4110, 5162, 5340, 7743, 7946, 8220, 10324, 11919, 12193, 12905, 15486, 15892, 19865, 23838, 24386, 25810, 30972, 36579, 38715, 39730, 47676, 48772, 51620, 59595, 60965, 73158, 77430, 79460, 119190, 121930, 146316, 154860, 182895, 238380, 243860, 353597, 365790, 707194, 731580, 1060791, 1414388, 1767985, 2121582, 3535970, 4243164, 5303955, 7071940, 10607910, 21215820]

約数ペア:

[(1, 21215820), (2, 10607910), (3, 7071940), (4, 5303955), (5, 4243164), (6, 3535970), (10, 2121582), (12, 1767985), (15, 1414388), (20, 1060791), (29, 731580), (30, 707194), (58, 365790), (60, 353597), (87, 243860), (89, 238380), (116, 182895), (137, 154860), (145, 146316), (174, 121930), (178, 119190), (267, 79460), (274, 77430), (290, 73158), (348, 60965), (356, 59595), (411, 51620), (435, 48772), (445, 47676), (534, 39730), (548, 38715), (580, 36579), (685, 30972), (822, 25810), (870, 24386), (890, 23838), (1068, 19865), (1335, 15892), (1370, 15486), (1644, 12905), (1740, 12193), (1780, 11919), (2055, 10324), (2581, 8220), (2670, 7946), (2740, 7743), (3973, 5340), (4110, 5162)]